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gptkbp:instanceOf
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gptkb:Traffic_control_device
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gptkbp:alsoKnownAs
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Traffic signals
Stoplights
Traffic lamps
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gptkbp:canBe
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Automatically operated
Manually operated
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gptkbp:color
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Green
Red
Yellow
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gptkbp:commonIn
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Urban areas
Suburban areas
Some rural areas
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gptkbp:component
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gptkb:Poles
Controller
Sensors
Timers
Lamps
Signal head
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gptkbp:deployment
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gptkb:London
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gptkbp:failureMode
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All lights off
All lights on
Flashing mode
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gptkbp:greenLightMeans
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gptkb:Go
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gptkbp:inventedBy
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gptkb:J._P._Knight
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gptkbp:maintenance
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Municipal authorities
Transport departments
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gptkbp:mayInclude
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Arrows
Countdown timers
Audible signals
Pedestrian symbols
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gptkbp:provides
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gptkb:Electricity
|
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gptkbp:purpose
|
Control flow of traffic
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gptkbp:redLightMeans
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Stop
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gptkbp:regulates
|
Bicycles
Vehicles
Pedestrians
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gptkbp:relatedTo
|
Urban planning
Traffic congestion
Road safety
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gptkbp:standardizedBy
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gptkb:Vienna_Convention_on_Road_Signs_and_Signals
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gptkbp:technology
|
gptkb:LED
Incandescent bulbs
Halogen bulbs
|
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gptkbp:usedIn
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Pedestrian crossings
Railway crossings
Road intersections
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gptkbp:yearInstalled
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1868
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gptkbp:yellowLightMeans
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Caution
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gptkbp:bfsParent
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gptkb:Crystal_Sky
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gptkbp:bfsLayer
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7
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https://www.w3.org/2000/01/rdf-schema#label
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Traffic Lights
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